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    <script>
        // 编写函数map(arr) 把数组中的每一位数字都增加30%

        function map(arr) {
            var result = [];
            for (var i = 0; i < arr.length; i++) {
                result.push(arr[i] * 1.3);
            }
            return result;
        }

        console.log(map([1, 2, 3]));
    </script>
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